API Change error when building AOSP 5.1

问题

Currently trying to build android-5.1.0_r5. I've checked out the sources and made no modifications. However, when compiling I get the following error.

Checking API: checkpublicapi-current
out/target/common/obj/PACKAGING/public_api.txt:20: error 5: Added public field android.Manifest.permission.BACKUP
out/target/common/obj/PACKAGING/public_api.txt:82: error 5: Added public field android.Manifest.permission.INVOKE_CARRIER_SETUP
out/target/common/obj/PACKAGING/public_api.txt:106: error 5: Added public field android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE
out/target/common/obj/PACKAGING/public_api.txt:116: error 5: Added public field android.Manifest.permission.RECEIVE_EMERGENCY_BROADCAST

******************************
You have tried to change the API from what has been previously approved.

To make these errors go away, you have two choices:
   1) You can add "@hide" javadoc comments to the methods, etc. listed in the
      errors above.

   2) You can update current.txt by executing the following command:
         make update-api

      To submit the revised current.txt to the main Android repository,
      you will need approval.
******************************

And diffing the public api txt files does indeed show a difference.

diff frameworks/base/api/current.txt out/target/common/obj/PACKAGING/public_api.txt 
19a20
>     field public static final java.lang.String BACKUP = "android.permission.BACKUP";
80a82
>     field public static final java.lang.String INVOKE_CARRIER_SETUP = "android.permission.INVOKE_CARRIER_SETUP";
103a106
>     field public static final java.lang.String READ_PRIVILEGED_PHONE_STATE = "android.permission.READ_PRIVILEGED_PHONE_STATE";
112a116
>     field public static final java.lang.String RECEIVE_EMERGENCY_BROADCAST = "android.permission.RECEIVE_EMERGENCY_BROADCAST";

However, I cant figure out where those additional Public Fields are coming from. Any ideas?

回答1:

I do see the entries in my r8 code so you are probably safe running make update-api, and when that finishes then run your make command as normal.

回答2:

Don't do 'make update-api' if you didn't touch anything. There additional apis came form frameworks/base/res/AndroidManifest.xml badly parsed by aapt that uses buggy system/core/libcore/String8.cpp@@removeAll() they use memcpy but should be memmove for overlapping strings in memory.

This is issue on latest Debian (sid) or Ubuntu (16 maybe 15) build machines. It's a google bug in libcore/String8.cpp. Fix is here: https://android.googlesource.com/platform/system/core/+/dd060f01f68ee0e633e9cae24c4e565cda2032bd

This man found it (Michael Scott) and maybe some other people too. Here is his investigation: https://plus.google.com/+hashcode0f/posts/URHo3hBmfHY

Big up himself!

来源：https://stackoverflow.com/questions/30998666/api-change-error-when-building-aosp-5-1

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